2001-09-14 05:34:53 +00:00
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//===-- TargetMachine.cpp - General Target Information ---------------------==//
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2005-04-21 22:55:34 +00:00
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//
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2003-10-20 19:43:21 +00:00
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// The LLVM Compiler Infrastructure
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//
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2007-12-29 20:36:04 +00:00
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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2005-04-21 22:55:34 +00:00
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//
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2003-10-20 19:43:21 +00:00
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//===----------------------------------------------------------------------===//
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2001-09-14 05:34:53 +00:00
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//
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// This file describes the general parts of a Target machine.
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//
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//===----------------------------------------------------------------------===//
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2001-07-21 12:42:08 +00:00
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2012-12-03 16:50:05 +00:00
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#include "llvm/Target/TargetMachine.h"
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2013-03-13 22:26:59 +00:00
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/IR/Function.h"
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2013-01-02 11:36:10 +00:00
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#include "llvm/IR/GlobalAlias.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/IR/GlobalVariable.h"
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2009-08-22 20:48:53 +00:00
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#include "llvm/MC/MCAsmInfo.h"
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2012-03-25 18:10:17 +00:00
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#include "llvm/MC/MCCodeGenInfo.h"
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2004-09-01 22:55:40 +00:00
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#include "llvm/Support/CommandLine.h"
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2003-12-28 21:23:38 +00:00
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using namespace llvm;
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2003-11-11 22:41:34 +00:00
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2004-03-04 19:16:23 +00:00
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//---------------------------------------------------------------------------
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// Command-line options that tend to be useful on more than one back-end.
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//
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2004-06-21 21:44:12 +00:00
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namespace llvm {
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2011-04-07 00:58:44 +00:00
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bool HasDivModLibcall;
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2009-03-25 01:47:28 +00:00
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bool AsmVerbosityDefault(false);
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2006-05-24 17:04:05 +00:00
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}
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2004-06-21 21:08:45 +00:00
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2010-04-13 00:36:43 +00:00
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static cl::opt<bool>
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DataSections("fdata-sections",
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cl::desc("Emit data into separate sections"),
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cl::init(false));
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static cl::opt<bool>
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FunctionSections("ffunction-sections",
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cl::desc("Emit functions into separate sections"),
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cl::init(false));
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2012-01-13 06:30:30 +00:00
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2001-07-21 12:42:08 +00:00
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//---------------------------------------------------------------------------
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2003-12-28 21:23:38 +00:00
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// TargetMachine Class
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//
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2004-08-10 23:10:25 +00:00
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2011-07-08 01:53:10 +00:00
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TargetMachine::TargetMachine(const Target &T,
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2011-12-02 22:16:29 +00:00
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StringRef TT, StringRef CPU, StringRef FS,
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const TargetOptions &Options)
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2011-07-20 01:27:58 +00:00
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: TheTarget(T), TargetTriple(TT), TargetCPU(CPU), TargetFS(FS),
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CodeGenInfo(0), AsmInfo(0),
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2010-11-19 02:26:16 +00:00
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MCRelaxAll(false),
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2011-01-23 18:50:12 +00:00
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MCNoExecStack(false),
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2011-03-28 22:49:19 +00:00
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MCSaveTempLabels(false),
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2011-04-30 03:44:37 +00:00
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MCUseLoc(true),
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2011-10-17 23:05:28 +00:00
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MCUseCFI(true),
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2011-12-02 22:16:29 +00:00
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MCUseDwarfDirectory(false),
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Options(Options) {
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2009-06-08 22:53:56 +00:00
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}
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2003-12-28 21:23:38 +00:00
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TargetMachine::~TargetMachine() {
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2011-07-20 01:27:58 +00:00
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delete CodeGenInfo;
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2006-09-07 23:39:26 +00:00
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delete AsmInfo;
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2003-12-28 21:23:38 +00:00
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}
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2013-03-13 22:26:59 +00:00
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/// \brief Reset the target options based on the function's attributes.
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void TargetMachine::resetTargetOptions(const MachineFunction *MF) const {
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const Function *F = MF->getFunction();
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TargetOptions &TO = MF->getTarget().Options;
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2013-11-21 11:08:31 +00:00
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2013-03-13 22:26:59 +00:00
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#define RESET_OPTION(X, Y) \
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do { \
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if (F->hasFnAttribute(Y)) \
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TO.X = \
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(F->getAttributes(). \
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getAttribute(AttributeSet::FunctionIndex, \
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Y).getValueAsString() == "true"); \
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} while (0)
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RESET_OPTION(NoFramePointerElim, "no-frame-pointer-elim");
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RESET_OPTION(LessPreciseFPMADOption, "less-precise-fpmad");
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RESET_OPTION(UnsafeFPMath, "unsafe-fp-math");
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RESET_OPTION(NoInfsFPMath, "no-infs-fp-math");
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RESET_OPTION(NoNaNsFPMath, "no-nans-fp-math");
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RESET_OPTION(UseSoftFloat, "use-soft-float");
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RESET_OPTION(DisableTailCalls, "disable-tail-calls");
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}
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2006-02-22 20:19:42 +00:00
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/// getRelocationModel - Returns the code generation relocation model. The
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/// choices are static, PIC, and dynamic-no-pic, and target default.
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2011-07-19 06:37:02 +00:00
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Reloc::Model TargetMachine::getRelocationModel() const {
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if (!CodeGenInfo)
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return Reloc::Default;
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return CodeGenInfo->getRelocationModel();
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2006-02-22 20:19:42 +00:00
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}
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2006-05-23 18:18:46 +00:00
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2006-07-06 01:53:36 +00:00
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/// getCodeModel - Returns the code model. The choices are small, kernel,
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/// medium, large, and target default.
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2011-07-20 07:51:56 +00:00
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CodeModel::Model TargetMachine::getCodeModel() const {
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if (!CodeGenInfo)
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return CodeModel::Default;
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return CodeGenInfo->getCodeModel();
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2006-07-06 01:53:36 +00:00
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}
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2012-06-23 11:37:03 +00:00
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/// Get the IR-specified TLS model for Var.
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static TLSModel::Model getSelectedTLSModel(const GlobalVariable *Var) {
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switch (Var->getThreadLocalMode()) {
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case GlobalVariable::NotThreadLocal:
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llvm_unreachable("getSelectedTLSModel for non-TLS variable");
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break;
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case GlobalVariable::GeneralDynamicTLSModel:
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return TLSModel::GeneralDynamic;
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case GlobalVariable::LocalDynamicTLSModel:
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return TLSModel::LocalDynamic;
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case GlobalVariable::InitialExecTLSModel:
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return TLSModel::InitialExec;
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case GlobalVariable::LocalExecTLSModel:
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return TLSModel::LocalExec;
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}
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llvm_unreachable("invalid TLS model");
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}
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2012-04-08 17:20:55 +00:00
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TLSModel::Model TargetMachine::getTLSModel(const GlobalValue *GV) const {
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2012-06-23 00:30:03 +00:00
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// If GV is an alias then use the aliasee for determining
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// thread-localness.
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if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
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GV = GA->resolveAliasedGlobal(false);
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const GlobalVariable *Var = cast<GlobalVariable>(GV);
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bool isLocal = Var->hasLocalLinkage();
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bool isDeclaration = Var->isDeclaration();
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2012-06-23 11:37:03 +00:00
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bool isPIC = getRelocationModel() == Reloc::PIC_;
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bool isPIE = Options.PositionIndependentExecutable;
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2012-04-08 17:20:55 +00:00
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// FIXME: what should we do for protected and internal visibility?
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// For variables, is internal different from hidden?
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2012-06-23 00:30:03 +00:00
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bool isHidden = Var->hasHiddenVisibility();
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2012-04-08 17:20:55 +00:00
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2012-06-23 11:37:03 +00:00
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TLSModel::Model Model;
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if (isPIC && !isPIE) {
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2012-04-08 17:20:55 +00:00
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if (isLocal || isHidden)
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2012-06-23 11:37:03 +00:00
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Model = TLSModel::LocalDynamic;
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2012-04-08 17:20:55 +00:00
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else
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2012-06-23 11:37:03 +00:00
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Model = TLSModel::GeneralDynamic;
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2012-04-08 17:20:55 +00:00
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} else {
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if (!isDeclaration || isHidden)
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2012-06-23 11:37:03 +00:00
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Model = TLSModel::LocalExec;
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2012-04-08 17:20:55 +00:00
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else
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2012-06-23 11:37:03 +00:00
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Model = TLSModel::InitialExec;
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2012-04-08 17:20:55 +00:00
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}
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2012-06-23 11:37:03 +00:00
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// If the user specified a more specific model, use that.
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TLSModel::Model SelectedModel = getSelectedTLSModel(Var);
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if (SelectedModel > Model)
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return SelectedModel;
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return Model;
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2012-04-08 17:20:55 +00:00
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}
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2011-11-16 08:38:26 +00:00
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/// getOptLevel - Returns the optimization level: None, Less,
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/// Default, or Aggressive.
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CodeGenOpt::Level TargetMachine::getOptLevel() const {
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if (!CodeGenInfo)
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return CodeGenOpt::Default;
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return CodeGenInfo->getOptLevel();
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}
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2013-11-22 19:11:24 +00:00
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void TargetMachine::setOptLevel(CodeGenOpt::Level Level) const {
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if (CodeGenInfo)
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CodeGenInfo->setOptLevel(Level);
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}
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2009-03-25 01:47:28 +00:00
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bool TargetMachine::getAsmVerbosityDefault() {
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return AsmVerbosityDefault;
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}
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void TargetMachine::setAsmVerbosityDefault(bool V) {
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AsmVerbosityDefault = V;
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}
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2010-04-13 00:36:43 +00:00
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bool TargetMachine::getFunctionSections() {
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return FunctionSections;
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}
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bool TargetMachine::getDataSections() {
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return DataSections;
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}
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void TargetMachine::setFunctionSections(bool V) {
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FunctionSections = V;
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}
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void TargetMachine::setDataSections(bool V) {
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DataSections = V;
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}
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